Fountain brush for applying lacquers



June 29, 1954 H. G. LEMOINE FOUNTAIN BRUSH FOR APPLYING LACQUERS FiledMay 6, 1948 INVENToR. Hana Le M01/'ne ATTORNEYS Patented June 29, 1954FOUNTAIN BRUSH FOR APPLYING LACQUERS- Henri Georges Lemoine, Ridgefield,Conn., as-

signor, by mesne assignments, to The Plastic Molding Corporation, SandyHook, Conn., a corporation of Connecticut Application May 6, 1948,Serial No. 25,343

Claims. l

My invention relates to a new and improved liquid-dispensing device ofthe fountain brush type for the applicative dispensing of liquidpreparations such as nail polishes, nail enamels, nail lacquers,perfumes and other highly volatile liquid preparations.

These liquid ingredient preparations include a liquid or ingredientswhich evaporate readily, so as to generate a vapor pressure which issufficient for the purposes of my invention when such liquids are warmedby heat radiated from the hand of the user. Such volatile liquidsinclude acetone, methyl acetone, ethyl formate, methylethyl ketone, andother lacquer solvents. These lacquer solvents are set forth at pages559-560 of The Chemistry and Manufacture of Cosmetics by de Navarre,published in 1941 by D. Van Nostrand Company Inc. Ethyl alcohol andother volatile ingredients of perfumes supply the necessary vaporpressure at low temperature.

According to my invention, I provide a bottle or other deep containercup for such liquid preparations with a dispensing brush or tuft of bersor bristles which contact with one another at the front or applicativeend-portion of said brush. At the rear or mounted end-portion of saidbrush, I preferably Ihold and conne said fibers so as to provide andsurround a recess of tapered shape in said brush at the rear end portionthereof, said recess being optionally of substantially conical shape.Said recess optionally tapers to a point at the front end of saidrecess.

I connect the rear end of said brush in a liquid-tight and gas-tightmanner in iiuid communication with the front end of the interior spaceof a bottle or other hollow container or magazine shell,` which issealed save at its front end. This bottle is made of glass or othermaterial which. has low heat conductivity, and

which is highly permeable to heat radiation especially through a thinwall thereof. This bottle is optionally and preferably transparent, inorder to have maximum permeability to heat radiation.

When this bottle is held in the hand and inverted, the heat of the handis quickly transmitted by radiation through the permeable wall of thebottle to the air and vapor and liquid in` the interior of the bottle.

The radiated heat rapidly produces enough vapor pressure in the interiorof the bottle to enable the liquid to be rapidly applied through thebrush when the brush bristles are pressed `and wiped against onesfinger-nail or the like. I have observed that if the bottle is made ofmetal which is a good conductor of heat, such bottle must be held in thehand during a longer period than when the bottle is made of poorlyconductive material. That is, when the bottle is made of metal which isa good conductor of heat and which is relatively impermeable to radiatedheat, the entire bottle must be heated before the necessary excess vaporpressure is secured in the interior of the bottle.

When a glass bottle equipped with said brush is inverted and held in thehand in a manner to supply radiated heat to the volatile ingredient oringredients of the liquid preparation, without subjecting the brush topressure, some of the liquid preparation will drop from the brush duringa short period in the form of one or a few separated drops, as atintervals of five seconds. At the end of this period, the excesspressure in the interior of the bottle will have become zero, and nomore liquid will drop from the brush, even if it continues to be held inthe hand.

When the bottle is thus inverted and held, the brush becomes partly orcompletely saturated with the liquid preparation, which can then beforced out of the brush by wiping pressure of the brush against a lingernail.

In ordinary use, the liquid which has been fed to the brush from themagazine shell will be sufficiently dispensed so that when itsapplicative wiping pressure is stopped none of the liquid preparationwill thereafter drop out of the brush. The brush does not provide aperfect air seal. When the container is held upright and deprived of thewarmth of the users hand, enough air will enter through the brush intothe interior of the container to provide air pressure in the containerwhich is equal to external atmospheric pressure.

Other objects of my invention will be stated in the annexed descriptionand drawings which illustrate a preferred embodiment thereof in whichdrawings:

Fig. 1 is a vertical sectional view which shows the container or bottleand its brush applicator located in an enclosing outer casing.

Fig. 2 is an elevation which shows the bottle and its brush applicatorremoved from the outer casing.

Fig. 3 is an enlarged vertical sectional view, partially in elevation,which illustrates certain parts of the assembled device on a largerscale than Fig. 1.

Fig. 4 is a vertical sectional view which illusstrates a modified formof base for the bottle.

The combined device comprises an outer relatively thick walled rigidcasing I in the nature of a cap or deeply cupped cover which is closedat its top or front end and which is open at its bottom or rear end.This outer casing I is made of material which has very low heatconductivity and very low permeability to radiated heat, in order toprovide eifective heat insulation for the bottle 2. As examples of somesuitable materials which can be used for making the outer casing I, Irefer to the polymeric amides known as nylon, phenolformaldehyde resins,ureaformaldehyde resins and the like. This casing I may have a blackcolor, which is preferred. It may have another color.

At and adjacent its bottom open end, the casing I is of reducedthickness and it is provided with an internal thread. The rear bottomend-portion of the glass bottle 2 is fixed to a rear or bottom base 3,which is also rigid and made of material of low heat conductivity andlow heat permeability. The bottom end-portion of the bottle 2 is fixedin the recess of the bottom rigid base 3 in any suitable manner. Forexample, I can use adhesive for this purpose. Said base 3 has a reducedend 3a whose external thread engages the internal thread at the bottomof casing I, to provide a tight joint. When the parts are l assembled asshown in Fig. 1, the end-wall of casing I preferably tightly abuts theshoulder of base 3, and the resultant joint is preferably gastight andliquid-tight.

At its top, the bottle 2 is provided with a neck 4a which has a bore 4.Said neck 4a has an external thread.

The respective threads of neck 4a and of flanges 3a are opposed, onebeing right-hand and the other being left-hand. Thus, the thread of neck4a may be a right-hand thread, and the thread of ange 3a may be aleft-hand thread. The thread of flange 3a is preferably of smaller pitchthan the thread of neck 4a.

The rear or bottom end-portion of the rigid and hollow bushing 5 is ofreduced thickness, and M it is provided with an internal thread, wherebysaid rigid bushing 5 can be screwed on neck 4a to provide a liquid-tightand gas-tight joint.

This bushing 5 has a bore 6, which is alined longitudinally with thebore I of neck 4a and in effect forms a head for the bottle that isremovable therefrom for filling the bottle.

Fig. 2 shows that the bushing 5 is provided with a metal shell 1. Thismetal shell 1 may be omitted, without departing from the invention, inwhich case the bushing 5 has the combined shape of the bushing 5 and theshell 'I which is shown in Fig. l. rIhis bushing 5 may be made of thepreviously-mentioned resins.

As shown in detail in Fig. 3, the hairs, bristles or bers of thebrush-applicator B form a tuft and are clamped and held in the bore 6 ofthe bushing 5 by means of a hollow inner metal Shell 8 and an outermetal shell 9. The inner shell 8 has a bore of less diameter than thebore 6. The outer wall of the inner shell 8 is of conical orfrusto-conical shape. The inner wall of the outer shell 5 is ofcorresponding shape. The bottom end-portions of hairs or fibers of thebrush B are thus clamped between the shells 3 and 9, which have afriction t in the bore 6 of the bushing 5. If desired, the hairs orfibers of the brush B may be adhesively connected to the adjacent wallsof the shells 8 and 9, and the shell 9 may be adhesively or otherwiseconnected to the cylindrical wall of the bore 6. I thus provide a brushB which has an upwardly tapered recess I0 at its inner end, said recessI0 being wholly or substantially free or at least partially free fromand wholly surrounded by the hairs or fibers of the brush B. The frontend of this recess I0 is spaced rearwardly from the tip of the brush B,so that the bers abut each other above the front end of the recess I0which tapers to a point. This recess I0 is of substantially conicalshape.

At its top, the inner face of the cross wall at the closed end of casingI abuts a washer type of gasket I I, which is made of resilient andcompressible material, such as vulcanized rubber. The top or front wallof gasket I I has an annular groove which interts tightly with acorresponding annular rib or projection of the said inner face of thecross wall of casing I. It is preferred to mold the gasket I I toprovide it with said front or top anular groove, although said gasketyII may be molded into ordinary disk shape with front and rear planarfaces. In such case the gasket I I is pressed against the said lateralinner face of casing I to compress the gasket II into the shape shown inFigs. 1 and 3.

The metal shell I is provided with an annular rib I2 which intertstightly with a corresponding annular groove or recess of the gasket II.It is optional to mold the rear or bottom wall of the gasket I I withsaid annular rib, or to mold said rear wall of gasket I I into planarshape. As previously noted, if the metal shell 'I is omitted, thebushing 5 has the same shape as the combined bushing 5 and metal shell'I. The bottom face of the gasket II which is shown in Fig. 3 ispreferably molded into initial planar shape. When the outer casing I andthe bottom cap 3 are screwed together into their relative positionsshown in Figs. 1 and 3, considerable longitudinal force is exerted in anaxial direction against gasket II so that the annular rib of metal shellis forced into the gasket II, as illustrated in Figs. l and 3.

In such case, when the bottle 2 and its assembled bushing 5 and metalshell 'I are removed from casing I, the rear or bottom face of gasket II resumes its planar shape. The abutting lateral faces of casing I andgasket II are fixed to each other by adhesive or in any other suitablemanner. This gasket II provides a very tight joint, which is preferablyliquid-tight and gas-tight, between shell 'I and the casing I.

An air space I4 is provided between the bottle 2 and its bushing 5 andshell 1 and the inner longitudinal wall of the casing I, in order toincrease the heat-insulating effect.

When the parts are assembled, the brush B is located and housed in afront internal cylindrical recess or cavity I5 of the casing I.

The recess I5 is preferably of the same diameter as the bores 4 and 6.When the device is assembled as shown in Fig. l, the resilient andcompressible gasket I I is under considerable longitudinal pressure, andthe entire brush B is located in recess I5. Said recess I5 is sealedliquid-tight and gas-tight by gasket II.

Hence, when the assembled device is inverted and even shaken by ordinarytransportation, the liquid in bottle I does not leak through brush Binto recess I5, because the interior of the bottle is kept at the sametemperature as the air in recess I5. In such case, the brush B will notbe saturated with the liquid and said brush B will remain dry orsubstantially dry.

the top of Fig. 1.

5. `When the casing I is unscrewed from base 3 and removed from base 3,and bottle 2 is held in the hand and inverted, the heat of the handcauses the liquid rapidly to wet the brush B sufficiently so that saidliquid can be deposited freely by the tip of brush B when brush B iswiped under pressure against the receptive surface.

' The bristles of brush B may be sufficiently fine and abut one anotherina suiciently dense cluster to provide a liquid-tight or non-drip sealor an almost liquid-tight and non-drip seal in the front or tip-portionof brush B, when said bristles or bers are in the normal unstressedshape shown in Figs. 1 and 3.

In the modification of Fig. 4, the internal cylindrical wall of the base3 is provided with vertical rows of internally projecting teeth 3c. Bymolding the base 3 from nylon, as an eX- ample, I provide teeth 3c whosetips can be easily'sheared off. The diameter of the outer wall of thebottle 2 is ordinarily more or less irregular. When the bottle 2 isforced longitudinally into final position in base 3, so that the bottomwall of the bottle 2 abuts the inner lateral wall of the base 3, some ofthese vertically alined teeth 3c will have their tips sheared off moreor less, and a tight frictional grip will be secured between said teeth3c and the wall of the bottle. Therefore, when the casing I is removed,the base 3l will remain rmly connected to the bottle 2.

As viewed at the top of Fig. l, the bushing 5 is screwed into positionon the bottle 2, by turning bushing 5 counterclockwise relatively tobottle 2, and casing I is screwed into the position shown in Fig. 1, byturning casing I clockwise relative to bottle 2 and base 3.

As casing I and base 3 approach each other longitudinally, the gasket IIis gradually longitudinally compressed. This exerts a clockwise orunscrewing torque upon bushing 5, so that it is moved longitudinallytowards gasket il. Since the internal thread of bushing 5 is of steeperpitch than the engaging threads of casing I and base 3, the longitudinalsealing pressure on gasket II, which is fixed to casing I, is causedmainly by the longitudinal movement of bushing 5 relative to neck 4a.

When casing l is thus finally assembled with Vbase 3, their fineinterengaging threads provide an air seal, even if the rear end-wall ofcasing I does not abut the shoulder of base 3.

The same partial unscrewing movement of bushing 5 relative to neck yllais secured if base 3 and bottle 2 are turned in unison relative tocasing I, in order to connect casing I and base 3.

When casing I and base 3 are in final assembled position, they aredetached by turning casing I counterclockwise relative to base 3, asviewed at This exerts a counterclockwise torque on bushing 5, thusmoving bushing '5 longitudinally away from gasket II.

Due to the coarse thread of bushing 5, there is only slight rotarymovement of bushing 5 relative to gasket II, when bushing 5 is thusmoved `is automatically elongated when casing I and `base.3 areconnected to each other, and said assembly of bottle 2 and bushing 5 isautomatically reduced in length when base 3 is separated from casing I.

This compensates for `irregularities in the respective lengths of bottle2 and bushing 5, and it reduces wear on the gasket II.

The internal diameter of bore 4 and bore 6, and the combined length ofbores 4 and 6 and shell 8 are an important feature.

In effect, the bore 6 and the bore of shell 8 are extensions of the bore4, so that it is not necessary to provide a bottle which has a longneck.

When the bottle 2 is enclosed in the casing I and base 3 to provide anair-tight seal, after some of the liquid preparation has been dispensed,the interior of the bottle 2 cools to the same temperature as in recessI5. The liquid preparation in the brush B is drawn back into the bottleby the lowering of pressure of the vapor and air in the bottle. A littleliquid preparation may remain in brush B. However, while the bottle 2remains enclosed in casing I and base 3, no liquid will drip from thebrush B even if the assembled device is inverted, because the recess I5is hermetically sealed. Some liquid preparation may enter the bore 4-6,if the assembled device is inverted but this bore is suciently long ofsuiiiciently small diameter, so that the liquid will not enter thebrush, and said liquid will preferably not even enter the shell 9.

If an easy flowing liquid preparation is in the bottle, such as aperfume, the diameter of the bore 4 5 and also of the shell 8 is madesufficiently small, and the length of such bore is suiiicientlyincreased to help retain liquid therein against tendency to flowtherethrough by gravity alone.

Also, in such case, the brush B may be made shorter and recess I5 canthus be made shorter.

I have described preferred embodiments of my invention, but numerouschanges and omissions and additions can be made without departing fromits scope. Thus, the invention is not necessarily limited to the use ofbase 3, which is fixed to the bottle 2, although this is a preferredelement and as hereinbefore proposed, some other kind of container madeof material other than glass but possessing the other herein specifiedphysical properties essential to this invention may be substituted forthe bottle 2, wherefore the appended claims are directed to and intendedto cover all such substitutes and equivalents as come within thebroadest interpretation of their terms.

I claim:

1. A leak-proof refillable fountain brush for personal use in applyingvolatile lacquer color to finger nails of the user, embodying incombination, a magazine shell for holding and feeding therefrom a highlyvolatile liquid lacquer, said magazine shell being open at one end andof slender elongate shape thereby to serve conveniently as a brushhandle, a refill permitting leakproof nozzle removably mounted on theopen end of said magazine shell, an elongate tuft of brush bristlesmounted on end in endwise relation to said nozzle in iuid communicationtherethrough with the interior of said magazine shell, and an elongatedeeply cupped cov-er telescopically encompassing at least a majorportion of the length of said magazine shell having a closed endcontaining a cavity adapted to house at least a portion of the length ofsaid tuft of bristles, said cover at one point in its length havingthreaded engagement with said magazine shell and at another point in itslength cooperating structurally with said nozzle to form an annular sealhermetically isolating said cover cavity from atmospheric pressure, andmeans preventing said nozzle from moving relatively to said magazineshell when said cover is removed from the latter by unscrewing from itssaid threaded engagement therewith.

2. A fountain brush for dispensing highly volatile liquids including adeep elongate cup adapted to contain a highly volatile dispensibleliquid and having a barrel forming tubular wall extending from an openend of said cup to a closed end portion thereof housing a storage spacefor said liquid, a reinforcing base in fixed relation to said closed endportion of said cup, an external screw thread on said base, a closurehead removably mounted on said open end of said cup, an annular externalseat on said head facing away from said cup, a brush applicatorincluding a tuft of bristles mounted on and projecting from said headconcentric with said annular seat, and a deeply cupped protective caphaving threaded engagement with said external thread and having atubular wall encompassing both said cup and said tuft of bristles, saidcap being sufciently larger than said cup in girth to provide a heatinsulative annular space extending therebetween from the open end to theclosed end portion of said cup and having an internal annular shoulderdisposed to be drawn suciently close to said annular seat by screwingsaid cap onto said threads thereby to isolate said storage space fromfluid communication with ambient air inside said cap.

3. A fountain brush for fin-ely controllable dispensing of highlyvolatile liquids, including the combination of, a deep elongate cupadapted to contain a highly volatile dispensible liquid and l having abarrel forming tubular wall extending from an open end of said cup to aclosed end portion thereof, said wall being made of material which hashigh heat permeability to radiant heat and sufficiently thin to permitthe ready passage therethrough of heat radiated from a users handthereby quickly to heat and expand the vapor of a volatile liquid insaid cup, a reinforcing base in iixed relation to said closed portion ofsaid cup, an external screw thread on said base, a closure headremovably mounted on the open end of said cup, an annular external seaton said head facing away from said cup, a brush applicator including atuft of bristles mounted on and projecting from said head concentricwith said ant nular seat, and a deeply cupped protective cap havingthreaded engagement with said external thread and having a tubular wallencompassing both said cup and said tuft of bristles, said cap beingsufiiciently larger' than said cup in girth to provide a protectiveannular space extending therebetween from the open end to the closed endportion of said cup and having an internal annulai` shoulder disposed tobe drawn sufficiently close to said annular seat by screwing said caponto said threads thereby to isolate said storage space from fluidcommunication with air inside said cap and to inhibit heat exchangethrough said walls between the interior of said cup and ambient air.

4. In combination, a bottle which has a hollow iront neck containing apassage therethrough and extending longitudinally forwardly of the bodyof said bottle, a hollow longitudinal bushing which is external to saidneck and which extends forwardly of said neck, said bushing having abushing-bore which is an extension of the passage of said neck, a brushwhich extends forwardly of said bushing, the rear end of said brushbeing fixed to the wall of the bore of said bushing,

CII

a base to which the rear end of said bottle is fixed having abase-thread, a casing which is external to said bottle, said casinghaving a casingthread at its rear end,'said casing-thread being adaptedto engage said base-thread to provide an assembly of said casing andsaid base, said assembly enclosing said bottle, said casing having aninwardly facing cross wall, said casing having a longitudinal recesswhich extends forwardly from the inner face of said cross wall, asealing gasket which has a gasket-bore, said recess and said gasket-borebeing longitudinally alined with said bushing-bore, said brush extendingthrough said gasket-bore into said recess in said casing, said bushingabutting said gasket and exerting longitudinal pressure against saidgasket in said assembly, said neck having an external and longitudinalneck-thread, said bushing having a longitudinal and internal-bushingthread which engages said neck-thread to connect said bushing to saidneck, the direction of said bushing-thread being opposed to thedirection of said casingthread.

5. In combination, a bottle which has a hollow front neck containing apassage therethrough and extending longitudinally forwardly of the bodyof said bottle, a hollow longitudinal bushing which is external to saidneck and which extends forwardly of said neck, said bushing having abushing-bore which is an extension of the passage of said neck, a brushwhich extends forwardly of said bushing, the rear end of said brushbeing xed to the wall of the bore of said bushing, a base to which therear end of said bottle is xed having a longitudinal base-thread, acasing which is external to said bottle, said casing having alongitudinal casing-thread at its rear end, said casing-thread beingadapted to engage said base-thread to provide an assembly of said casingand said base, said assembly enclosing said bottle, said casing havingan inwardly facing cross wall, said casing having a longitudinal recesswhich extends forwardly from the inner face of said cross wall, asealing gasket which has a gasket-bore, said recess and said gasket-borebeing longitudinally alined with said bushing-bore, said brush extendingthrough said gasket-bore into said recess in said casing, said bushingabutting said gasket and exerting longitudinal pressure against saidgasket in said assembly, said neck having an external and longitudinalneck-thread, said bushing having a longitudinal and internal-bushingthread which enga-ges said neck-thread to connect said bushing to saidneck, the direction of said bushing-thread being opposed to thedirection of said casingthread, said bushing-thread having a steeperpitch than said casing-thread.

6. In combination, a bottle which has a hollow front neck containing apassage therethrough and extending longitudinally forwardly of the bodyof said bottle, a hollow longitudinal bushing which is external to saidnecl; and which extends forwardly of said neck, said bushing beingconnected to the outer wall of said neck. said bushing having abushing-bore which is an extension of the passage of said neck, a brushwhich extends forwardly of said bushing, the rear end of said brushbeing fixed to the wall of the bore of said bushing, a base to which therear end of said bottle is fixed having a longitudinal base-thread, acasing which is external yto said bottle, said casing having alongitudinal casing-thread at its rear end, said casing-thread beingadapted to engage said base-thread to provide an assembly of said casingand said base, said assembly enclosing said bottle, said casing havingan inwardly facing cross wall, said casing having a longitudinal recesswhich extends forwardly from the inner face of said cross wall, asealing gasket which has a gasket-bore, said recess and said gasket-borebeing longitudinally alined with said bushing-bore, said brush extendingthrough said gasket-bore into said recess in said casing, said bushingabutting said gasket and exerting longitudinal pressure against saidgasket in said assembly, Said casing and said base being made ofmaterial which has low permeability to radiant heat and having lowheatconductivity, the wall of said bottle being made I of material whichhas high permeability to radiant heat relative to its heat conductivity,so that the interior of said bottle is heated more quickly by radiantheat than by conducted heat.

7. In combination, a bottle which has a hollow front neck containing apassage therethrough and extending longitudinally forwardly of the bodyof said bottle, a hollow longitudinal bushing which is external to saidneck and which extends forwardly of said neck, said bushing beingconnected to the outer wall of said neck, said bushing having abushing-bore which is an extension of the passage of said neck, a brushwhich extends forwardly of said bushing,

the rear end of said brush being fixed to the wall of the bore of saidbushing, a base to which the rear end of said bottle is xed'having alongitudinal 4base-thread, a casing which is external to said bottle,said casing having a longitudinal casing-thread at its rear end, saidcasing-thread being adapted to engage said base-thread to provide anassembly of said casing and said base, said assembly enclosing saidbottle, said casing having an inwardly facing cross wall, said casinghaving a longitudinal recess which extends forwardly from the inner faceof said cross wall, a sealing gasket which has a gasket-bore, saidrecess and said gasket-bore being longitudinally alined with saidbushing-bore, said brush extending through said gasket-bore into saidrecess 'L' in said casing, said bushing abutting said gasket andexerting longitudinal pressure against said gasket in said assembly,said neck having an external and longitudinal neck-thread, said bushinghaving a longitudinal and internal-bushing thread which engages saidneck-thread to connect said bushing to said neck, the direction of saidbushing-thread being opposed to the direction of said casing-thread,said casing and said base being made of material which has lowpermeability to radiant heat and having low heatconductivity, the wallof said bottle being made of material which has high permeability toradiant heat relative to its heat conductivity, so that the interior ofsaid bottle is heated more quickly by radiant heat than by conductedheat.

8. The combination of, an elongate bottle adapted to contain adispensible liquid having a highly volatile ingredient, said bottlehaving a slender girth to be grasped conveniently by a users hand andhaving a wall suiliciently thin to be permeable to heat radiated fromsaid hand, a head removably mounted on said bottle containing apassageway affording restricted communication between the interior andexterior of the bottle, said passageway being sufficiently long andnarrow to help retain said liquid against tendency to ow therethrough bygravity alone in the absence of liquid expelling force differentialbetween gas pressures inside of and outside of said bottle, said bottlebeing'equipped with an external thread near its closed end most remotefrom said head, a brush applicator mounted on said head including a tuftof bristles forming a substantially non drip closure for said passagewayin the absence of a liquid expelling force differential between said gaspressures, said tuft being sufficiently permeable to air to permit airto enter said bottle when gas pressure inside said bottle is less thanatmospheric pressure, and a deeply cupped protective cap having threadedengagement with said external thread and having a wall encompassing boththe bottle and said brush applicator, said cap being sufh.- cientlylarger than the girth of said bottle to aiford a heat insulative annularspace therebetween sealed by said threaded engagement,

. whereby upon occasional use of the bottle for dispensing its containedliquid when said cap is removed from said bottle and the bottle isgrasped directly by the hand of the user sufficient heat is radiatedfrom the users hand inwardly through said thin bottle wall to evaporatethe volatile ingredient 'of the bottle contained liquid thereby togenerate in said bottle vapor pressure sufciently greater thanatmospheric pressure to force liquid from said passageway into saidbrush applicator.

9. The combination of an elongate bottle adapted to contain adispensible liquid having a highly volatile ingredient, said bottlehaving a slender girth to be grasped conveniently by a users hand andhaving a wall sufficiently thin to be permeable to heat radiated fromsaid hand, a head removably mounted on said bottle containing apassageway affording restricted communication between the interior andexterior of the bottle, said passageway being suiiiciently long andnarrow to help retain said liquid therein against tendency to flowtherethrough by gravity alone in the absence of liquid expelling forcedifferential between gas pressures inside of and outside of said bottle,said bottle being equipped with an external thread near its closed endmost remote from said head, a brush applicator f mounted on said headincluding a tuft of bristles forming a substantially non drip closurefor said passageway in the absence of a liquid expelling forcedifferential between said gas pressures, said tuft being suicientlypermeable to air to permit air to enter said bottle when gas pressureinside said bottle is less than atmospheric pressure, and a deeplycupped protective cap having threaded engagement with said externalthread and having a wall encompassing both the bottle and said brushapplicator, said cap wall being sufliciently thicker than said thinbottle wall to be relatively impermeable to heat radiated from the usershand whereby upon occasional use of the bottle for dispensing itscontained liquid when said cap is removed from said bottle and thebottle is grasped directly by the hand of the user sufficient heat isradiated from the users hand inwardly through said thin bottle wall toevaporate the volatile ingredient of the bottle contained liquid therebyto generate in said bottle vapor pressure sunlciently greater thanatmospheric pressure to force liquid from said passageway into saidbrush applicator, and a gasket interposed axially between said cap andsaid bottle head to be squeezed therebetween in a manner to make a fluidtight seal when said cap and said bottle are screwed together by meansof said threaded engagement.

10. The combination of an elongate bottle adapted to contain adispensible liquid having a highly volatile ingredient, said bottlehaving a slender girth to be grasped conveniently by a users hand andhaving a wall sufficiently thin to be permeable to heat radiated fromsaid hand, a head removably mounted on said bottle containing apassageway affording restricted communication between the interior andexterior of the bottle, said passageway being suiiiciently long andnarrow to help retain said liquid therein against tendency to iiowtherethrough by gravity alone in the absence of liquid expelling forcedifferential between gas pressures inside of and outside of said bottle,said bottle being equipped with an external thread near its closed endmost remote from said head, a brush applicator mounted on said headincluding a tuft of bristles forming a substantially non drip closurefor said passageway in the absence of a liquid expelling forcedifferential between said gas pressures, said tuft being suflicientlypermeable to air to permit air to enter said bottle when gas pressureinside said bottle is less than atmospheric pressure, and a deeplycupped protective cap having threaded engagement with said externalthread and having a wall encompassing both the bottle and said brushapplicator, said cap wall being suiiiciently thicker than said thinbottle wall to be relatively impermeable to heat radiated from the usershand whereby upon occasional use of the bottle for dispensing itscontained liquid when said cap is removed from said bottle and 12 thebottle is grasped directly by the hand of the user suflicient heat isradiated from the users hand inwardly through said thin bottle wall toevaporate the volatile ingredient of the bottle contained liquid therebyto generate in said bottle vapor pressure sufficiently greater thanatmospheric pressure to force liquid from said passageway into saidbrush applicator, and a gasket at the end of said bottle most remotefrom said external thread interposed axially between said cap and saidbottle head to be squeezed therebetween in a manner to make a fluidtight seal when said cap and said bottle are screwed together by meansof said threaded engagement.

References Cited in the le of this patent UNITED STATES PATENTS NumberName Date 474,940 Barnes May 17, 1892 1,156,441 Stearns Oct. 12, 19151,620,801 Clark Mar. l5, 1927 1,641,650 Walker Sept. 6, 1927 2,075,987Houck Apr. 6, 1937 2,136,979 Mureau Nov. 15, 1938 2,227,235 Robbins Dec.3l, 1940 2,313,865 Dworkin Mar. 16, 1943 2,377,117 Watkins May 29, 19452,416,596 Rosenthal Feb. 25, 1947 FOREIGN PATENTS Number Country Date24,609 Great Britain Nov. 28, 1905 674,794 Germany Apr. 22, 1939

